<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>6_5_2-组件树结构</title>
</head>

<body>


  <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
  <div id="Application">
    <div style="position: absolute; width: 50px">
      <my-alert></my-alert>
    </div>
  </div>
  <script>
    const App = Vue.createApp({});
    App.component("my-alert", {
      template: `
        <div>
            <button @click="show = true">弹出弹窗</button>
            </div>
            <div v-if="show" style="text-align:center;
            padding:20px;
            position:absolute;
            top:45%;
            left:30%;
            width:40%;
            border:black solid 2px;
            background-color:white">
            <h3>弹窗</h3>
            <button @click="show = false">隐藏弹窗</button>
            </div>
        `,
      data() {
        return {
          show: false,
        };
      },
    });
    App.mount("#Application");
  </script>
</body>

</html>